package com.house.framework.utils;

import com.house.framework.entity.Logininfo;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.util.StringUtils;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.context.support.WebApplicationContextUtils;

import javax.servlet.http.HttpServletRequest;

/**
 * @ClassName LoginContext 获取登录用户信息
 * @Version 1.0
 */
public class LoginContextUtil {

    public static Logininfo getLoginContext() {
        //请求: RequestContextHolder是SpringMVC中的一个请求上下文工具，里面有ServletRequestAttributes
        //而：ServletRequestAttributes里面有请求对象
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = requestAttributes.getRequest();
        return getLoginContext(request);
    }

    public static Logininfo getLoginContext(HttpServletRequest request) {
        // 拿到token
        String token = request.getHeader("token");

        if (!StringUtils.isEmpty(token)) {
            // 不能通过注解获取redisTemplate
            // 获取spring容器
            WebApplicationContext applicationContext = WebApplicationContextUtils.getWebApplicationContext(request.getServletContext());
            // 再从容器里面获取bean
            RedisTemplate redisTemplate = (RedisTemplate) applicationContext.getBean("redisTemplate");

            Object obj = redisTemplate.opsForValue().get(token);
            if (obj != null) {
                return (Logininfo)obj;
            }
        }
        return null;
    }
}
